feat: 초기 프로젝트 설정 및 룰.md 파일 추가

api.hyungi.net/node_modules/pidusage/lib/helpers/parallel.js

@@ -0,0 +1,44 @@
+// execute an array of asynchronous functions in parallel
+// @param {Array} fns - an array of functions
+// @param {Function} done - callback(err, results)
+function parallel (fns, options, done) {
+  if (typeof options === 'function') {
+    done = options
+    options = {}
+  }
+
+  let keys
+  if (!Array.isArray(fns)) { keys = Object.keys(fns) }
+  const length = keys ? keys.length : fns.length
+  let pending = length
+  const results = keys ? {} : []
+
+  function each (i, err, result) {
+    results[i] = result
+
+    if (--pending === 0 || (err && !options.graceful)) {
+      if (options.graceful && err && length > 1) {
+        err = null
+      }
+
+      done && done(err, results)
+      done = null
+    }
+  }
+
+  if (keys) {
+    keys.forEach(function (key) {
+      fns[key](function (err, res) {
+        each(key, err, res)
+      })
+    })
+  } else {
+    fns.forEach(function (fn, i) {
+      fn(function (err, res) {
+        each(i, err, res)
+      })
+    })
+  }
+}
+
+module.exports = parallel